Process of and apparatus for



(No Model.)

R. M. OAFFALL.

PROCESS OF AND APPARATUS FOR APPLYING WATERPROOFING MATERIAL.

No. 253,505. Patented Feb. 14, 1882.

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UNITED STATES PATENT OFFICE.

ROBERT-M. CAFFALL, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TOTHEODORE HUNT, OF SAME PLACE.

PROCESS OF AND APPARATUS FOR APPLYING WATERPROOFING MATERIAL.

SPECIFICATION forming part of Letters Patent No. 253,505, dated February14, 1882.

' Application filedOctober31, 1881. (No model.)

To all whom it may concern Be it known that I, ROBERT M. OAFFALL,ofSt.Louis, in the eouutyof St. Louis and State ofMissouri, haveinvented certain new and useful Improvements in Processes of andApparatus for Applying Waterproofing Material; and I do hereby declare.that the following is a full, clear, and exact description of theinvention, which will enable others skilled in the art to which itappertains to make and use the same, reference being had to the accompanyin gdrawings, which form a part of this specification.

This invention relates to an improved process of and apparatus'forapplying waterproofing and preserving compounds to the walls ofbuildings, as will be hereinafter fully described with reference to thedrawings, in which Figure 1 isa perspective view of my improvedapparatus complete. Fig. 2 is a vertical sectional view. Fig. 3 is asectional view of the lamp and vessel for heating the compound, andFig.4is a view of the fire-cage detached. Corresponding parts in the severalfigures are denoted by like letters of reference.

Arepresentsascaffolchadapted to besuspended and adjusted in the usualmanner by means of pulleys and tackle upon the building to be treated,and consisting of the stirrups B, floor O, and side guards, D. Thestirrups are provided with arms or brackets E, connected by a rail, F. GG are uprights secured to railF and to one of the side guards, andhaving brackets or hooks H. Hooks I are also arranged upon the underside of the scaffold.

J is an apparatus for heating the waterproofing and preserving compound.Said apparatus consists of a casing, K, having a. door, L, at its lowerend, through which a lamp, M, may be conveniently inserted or removed.In the casing and resting upon its upper edge is placed a flangedvessel, N, to hold the compound, and the casing is provided near itsupper and lower end with draft openings or apertures O.

P is a box or cage, made of sheet metal or other suitable material, andhaving its front side perforated or made of stout, coarse wirescreening, to hold a charcoal fire. Box P has a cover, Q, and a bail orhandle, R. Several of the cages P, containing burning coals, are to besuspended upon the hooks H I, adjoining the wall of the building uponwhich the scaffold is suspended, thus heating said wall above and belowthe scaffold, upon which the heating apparatus J is also placed.

The operation is follows: The compound, which may be a composition ofparaffine, turpentine, and creosote patented to me on August 10, 1880,is placed in the vessel N and heated until it melts. In the meantimea-portion of the wall becomes heated by the fire contained in the cagesP. When the compound is perfectly fluid it is applied, preferably bymeans ot'an ordinarypaint-brush, to the heated surface of the wall,which thus roadilyabsorbs the compound. While this is being done theportion of the wall just below the scaffold is being heated by the tirecontained in the cages suspended upon hooks I, so that on lowering thescaffold the workmen may proceed with the application of the compoundwithout loss of time. At the same time, by lowering the scaffold thefire-cages suspended upon the hooks H are brought opposite the portionof the wall to which the compound has just been applied, thus serving todrive the compound into the pores of the building material.

I would state that while the fire-cages P, arranged as herein de cribed,are most desirable, suitable blow-pipes or other heating apparatus maybcsubstituted.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United States 1. The process of treating thewallsof buildin'gs with waterproofing and preserving compounds, whichconsists in first heating the wall, next applying the compound in afluid and heated state, and, finally, reheating the wall to cause thecomplete absorption of the compound, substantially as described, for thepurpose set forth.

.2. The scaffold A, having stirrups B, provided with brackets E, sideguards, D, railF, uprights G, having hooks H, and the books I, incombination with the fire-cages P, suspended upon the hooks H I, aboveand below the scaffold, as described, for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

ROBERT MAY OAFFALL.

Witnesses:

B. J. GORDRER, J. R. LITTELL.

